Rhoda Lillian Rennie (2 May 1905 in Benoni – 11 March 1963) was a South African freestyle swimmer who competed in the 1928 Summer Olympics.
In 1928 she was a member of the South African relay team which won the bronze medal in the 4×100 m freestyle relay event.
She also competed in the 100 metre freestyle competition and in the 400 metre freestyle event, but was in both eliminated in the first round.